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New build will not boot monitor

Discussion in 'Processors and Motherboards' started by josbd, Feb 22, 2008.

Page 2 of 2

  1. josbd TechSpot Enthusiast Posts: 289

    Delay in replying was brought about because ebuyer sent me a motherboard in erm three pieces........

    OK Tedster, I think you must be right. It IS a cheap power supply, but I would have thought that at 750 watts, even a cheap supply would have booted up.

    So: I have been considering a few brands for the new PSU. Hiper, Thermaltake, and Tagan. Any recommendations would be welcome. And would a DECENT psu at a wattage of about 450 to 500 watts be enough? I am on a limited budget, so around £50/£60 would prob be the amount I can spend.
    josbd, Apr 8, 2008
    #21

  2. mailpup TS Special Forces Posts: 7,907   +77

    I don't know if this would account for not booting but does the motherboard support your CPU? That is, if possible, check your BIOS version to be sure it supports your AMD CPU family. For example, if your processor is in the Brisbane family, only more recent BIOS versions support them. Check this link to the Gigabyte website for the CPU supported list.

    That said, I'm not sure how you can tell what BIOS version you have if it won't even post. You might get in the ballpark by comparing the motherboard revision number and the date it came out with the published date of each BIOS version.

    Perhaps this is not the problem but it wouldn't hurt to check it.
    mailpup, Apr 8, 2008
    #22

  3. josbd TechSpot Enthusiast Posts: 289

    Very good point........... and yes, very difficult to work out!

    Thing is, apart from the monitor not coming to life, it does appear to get as far as posting, so I can only assume that I need a better PSU to deal with the SLI board.
    josbd, Apr 9, 2008
    #23

  4. josbd TechSpot Enthusiast Posts: 289

    Have just checked the CPU, and it is a Brisbane core.......
    josbd, Apr 9, 2008
    #24

  5. mailpup TS Special Forces Posts: 7,907   +77

    This could be part of the problem but not necessarily. Just this week I built an PC with an MSI motherboard that turned out to have a BIOS version that did not support the Brisbane core CPU I installed. I had AMI BIOS 2.1 but Brisbane support did not commence until version 2.2 or 2.3. However, it still posted and I was able to install the operating system and then I could flash the BIOS to the most recent version (2.6). On the other hand perhaps Gigabyte boards are more sensitive to a mismatch. I don't know. I have read of new PCs that wouldn't work with unsupported CPUs though. One solution I read was to substitute a cheap but supported CPU, install the OS, flash the BIOS and then reinstall the first CPU which was now supported by the new BIOS, then reinstall the OS. A little extreme but it worked.

    Anyway, you could get a power supply tester to check the voltage on each of the rails to make sure they are up to snuff. One rail with too low of a voltage could cause a no start condition. Also, when getting a power supply it's not just the voltage but the amps, especially on the +12V rail or rails. So we have level of voltage on each rail (including 3.3V and 5V), stability of voltage (fluctuations) and amps to worry about besides overall watts.
    mailpup, Apr 9, 2008
    #25

  6. josbd TechSpot Enthusiast Posts: 289

    Problem solved!!!

    It is the wiring in the damned Thermaltake case that is shorting everything out.......

    *bangs head*

    Put everything in an old case... bingo. No problems booting.

    Thank you all very much indeed for your help. Very very much appreciated!
    josbd, Apr 10, 2008
    #26
     

  7. kimsland Ex-TechSpotter Posts: 18,353

    or the case fan
    kimsland, Apr 10, 2008
    #27

  8. mailpup TS Special Forces Posts: 7,907   +77

    Most cases need standoffs. Were they left off so that the motherboard was shorting to the case?
    mailpup, Apr 10, 2008
    #28
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